Prefer master rather than trunk in README [ci skip]

README.ja.md

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=trunk)](https://travis-ci.org/ruby/ruby)
-[![wercker status](https://app.wercker.com/status/e5e7e1704f62b76525022aa424aef6ef/s/trunk "wercker status")](https://app.wercker.com/project/byKey/e5e7e1704f62b76525022aa424aef6ef)
-[![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/trunk?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/trunk)
+[![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=master)](https://travis-ci.org/ruby/ruby)
+[![wercker status](https://app.wercker.com/status/e5e7e1704f62b76525022aa424aef6ef/s/master "wercker status")](https://app.wercker.com/project/byKey/e5e7e1704f62b76525022aa424aef6ef)
+[![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/master?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/master)
 [![Build Status](https://dev.azure.com/rubylang/ruby/_apis/build/status/ruby.ruby?branchName=master)](https://dev.azure.com/rubylang/ruby/_build/latest?definitionId=3&branchName=master)
 
 
@@ -24,7 +24,7 @@ Rubyはテキスト処理関係の能力などに優れ，Perlと同じくらい
 *   ダイナミックローディング (アーキテクチャによる)
 *   移植性が高い．多くのUnix-like/POSIX互換プラットフォーム上で動くだけでなく，Windows， macOS，
     Haikuなどの上でも動く cf.
-    https://github.com/ruby/ruby/blob/trunk/doc/contributing.rdoc#platform-maintainers
+    https://github.com/ruby/ruby/blob/master/doc/contributing.rdoc#platform-maintainers
 
 
 ## 入手法
@@ -45,7 +45,7 @@ https://www.ruby-lang.org/ja/downloads/
 
     $ git ls-remote https://github.com/ruby/ruby.git
 
-Rubyリポジトリの本来のtrunkは https://git.ruby-lang.org/ruby.git にあります．
+Rubyリポジトリの本来のmasterは https://git.ruby-lang.org/ruby.git にあります．
 コミッタはこちらを使います．
 
 ### Subversion

README.md

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=trunk)](https://travis-ci.org/ruby/ruby)
-[![wercker status](https://app.wercker.com/status/e5e7e1704f62b76525022aa424aef6ef/s/trunk "wercker status")](https://app.wercker.com/project/byKey/e5e7e1704f62b76525022aa424aef6ef)
-[![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/trunk?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/trunk)
+[![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=master)](https://travis-ci.org/ruby/ruby)
+[![wercker status](https://app.wercker.com/status/e5e7e1704f62b76525022aa424aef6ef/s/master "wercker status")](https://app.wercker.com/project/byKey/e5e7e1704f62b76525022aa424aef6ef)
+[![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/master?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/master)
 [![Build Status](https://dev.azure.com/rubylang/ruby/_apis/build/status/ruby.ruby?branchName=master)](https://dev.azure.com/rubylang/ruby/_build/latest?definitionId=3&branchName=master)
 
 # What's Ruby
@@ -22,7 +22,7 @@ It is simple, straightforward, and extensible.
 *   Dynamic Loading of Object Files (on some architectures)
 *   Highly Portable (works on many Unix-like/POSIX compatible platforms as
     well as Windows, macOS, Haiku, etc.) cf.
-    https://github.com/ruby/ruby/blob/trunk/doc/contributing.rdoc#platform-maintainers
+    https://github.com/ruby/ruby/blob/master/doc/contributing.rdoc#platform-maintainers
 
 
 ## How to get Ruby
@@ -43,7 +43,7 @@ to see the list of branches:
 
     $ git ls-remote https://github.com/ruby/ruby.git
 
-You may also want to use https://git.ruby-lang.org/ruby.git (actual trunk of Ruby source)
+You may also want to use https://git.ruby-lang.org/ruby.git (actual master of Ruby source)
 if you are a committer.
 
 ### Subversion

spec/ruby/core/regexp/case_compare_spec.rb

@@ -17,7 +17,7 @@ describe "Regexp#===" do
     (/a/ === :b).should be_false
   end
 
-  # mirroring https://github.com/ruby/ruby/blob/trunk/test/ruby/test_regexp.rb
+  # mirroring https://github.com/ruby/ruby/blob/master/test/ruby/test_regexp.rb
   it "returns false if the other value cannot be coerced to a string" do
     (/abc/ === nil).should be_false
     (/abc/ === /abc/).should be_false